TY - JOUR
T1 - Superior capacitive energy storage capability in polymer composites induced by polydopamine-coated paraelectric platelets
AU - Chen, Jie
AU - Wang, Yifei
AU - Chen, Weixing
N1 - Publisher Copyright:
© 2021, The Author(s), under exclusive licence to Springer Science+Business Media, LLC part of Springer Nature.
PY - 2021/5
Y1 - 2021/5
N2 - Dielectric nanocomposites with excellent energy storage capabilities have great potential applications in film energy storage capacitors. However, limited energy storage density (Ue) and poor efficiency (η) of nanocomposites based on the incorporation of the high dielectric constant (εr) fillers restrict their practical energy storage application due to low breakdown strengths (Eb) and electric displacement difference (Dmax-Drem) value. Herein, paraelectric SrTiO3 (ST) plates have been successfully synthesized through three-step molten salt process and modified by polydopamine (PDA) nanolayer. The moderate dielectric constant ST has the advantage for increasing the breakdown strength of poly(vinylidene fluoride) (PVDF)-based composites owing to the mitigation of electric field distortion. The ST@PDA platelets bring the highest Dmax-Drem (8.65 μC/cm2) together with enhanced Eb (350 MV/m) to the composites on account of the strong microscopic barrier layers. Consequently, the composite film filled with optimized ST@PDA platelets content (2.5 vol%) endows the maximum Ue of 12.45 J cm−3 at 350 MV/m, which presents the best result when compared to the neat PVDF and dielectric nanocomposites added with diverse ST morphologies including nanoparticles, nanowires, and nanofibers reported previously. This work offers an efficiency strategy utilizing high insulating paraelectric fillers with a plate structure to maximize the improvement in capacitive energy storage performance for dielectric composites. Graphical abstract: [Figure not available: see fulltext.].
AB - Dielectric nanocomposites with excellent energy storage capabilities have great potential applications in film energy storage capacitors. However, limited energy storage density (Ue) and poor efficiency (η) of nanocomposites based on the incorporation of the high dielectric constant (εr) fillers restrict their practical energy storage application due to low breakdown strengths (Eb) and electric displacement difference (Dmax-Drem) value. Herein, paraelectric SrTiO3 (ST) plates have been successfully synthesized through three-step molten salt process and modified by polydopamine (PDA) nanolayer. The moderate dielectric constant ST has the advantage for increasing the breakdown strength of poly(vinylidene fluoride) (PVDF)-based composites owing to the mitigation of electric field distortion. The ST@PDA platelets bring the highest Dmax-Drem (8.65 μC/cm2) together with enhanced Eb (350 MV/m) to the composites on account of the strong microscopic barrier layers. Consequently, the composite film filled with optimized ST@PDA platelets content (2.5 vol%) endows the maximum Ue of 12.45 J cm−3 at 350 MV/m, which presents the best result when compared to the neat PVDF and dielectric nanocomposites added with diverse ST morphologies including nanoparticles, nanowires, and nanofibers reported previously. This work offers an efficiency strategy utilizing high insulating paraelectric fillers with a plate structure to maximize the improvement in capacitive energy storage performance for dielectric composites. Graphical abstract: [Figure not available: see fulltext.].
UR - https://www.scopus.com/pages/publications/85101052937
U2 - 10.1007/s10853-021-05883-5
DO - 10.1007/s10853-021-05883-5
M3 - 文章
AN - SCOPUS:85101052937
SN - 0022-2461
VL - 56
SP - 9395
EP - 9407
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 15
ER -